Headless bolt.



A. E. BURRDGB HEADLESS BOLT. APPLIOATIOE FILED AUG. 7. 1.91.2.

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To all whom t may concern.'

@NEED STATES PATENT FFCE..

ALBERT E. BURRI'IDGE, OF` HUMMELSTOWN, PENNSYLVANIA.

HEADLESS BOLT.

Specification o'f Letters Patent.

Patented Oct. '14 1913.

Application med August 7, 1912. serial N o. 713,830.

The present invention relates to bolts, and

aims to provide an improved headless bolt embodyingl means at the end which is usually-headed so that the vsaid end may be inserted through the bolt holein an lobject and operableto engage the object so as toy prevent the withdrawal of the bolt, in order .that the .bolt may be employed in thev usual.

capacity of asecurmg member.

It is also the object of the present invention to lprovide a bolt of thechara-cter in dicated which shall be simple, substantial,

durable, compactjandinexpensive in 0011.-'

struction, as well vas convenient, serviceable, and etlicient in use. l i

`With-` the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and 'arrangement of parts and in the details of construction hereinafter described,

and claimed, it being understood that changes in the precise embodiment of the invent-ion herein disclosed, can be made within the' scope of what is claimed, without departing from the spirit of the invention.

" The invention has been illustrated in its preferred embodiment inthe accompanying drawings, wherein like reference characters have been employed to denote corresponding Figure 1 is apers ective *View ofl a bolt constructed in accor'` ance with the present 1n the' wrongy d1rect1on, the inner end 1'5 of invention, parts lbeing broken away. Fig.

2 is a longitudinal sectionalfview thereof,

showing the bolt being lpassed through an object. Fig. 3 is a-view similar to Fig.l 2

after the end of the bolt has'been .passed through the object and locked against withdrawal. Fig. 4 is a .transverse section'of the bolt. Fig. isa perspective view of the locking member.- Fig. 6 is a side elevat-ion ofen arbitrary structure showing a plurality of the'present bolts applied thereto, parts being broken away.

Referring specifically `to .the drawings, the

asl to relieve the fulcrum pin 13-of bolt-has been designated bythe numeral 7, shearing strain,-the outer end of the openthe same being ofany desired length and diameter, and being provided at one end with the screw threads 8 and with a reduced extension 9 which is square or non-circular in contour. The extension 9 facilitates driving the bolt through an object Without injuring the screw threads, and also permits the bolt to be rotated 'by a wrench or other device, when desired." The other end' of the bolt is rounded in. order to convenience the insertion'of the said Iend inthe b olt hole,v

the said .end not being provided with the usual head so that the said end may be inserted into the bolt hole and pushed therethrough.. Adjacent the latter end of the bolt, the bolt is provided with a longitudinally elongated opening 10 therethrough and is provided with longitudinalslots 11 at the sides of the opening llO. This opening 10 is of such dimensions as to not materially weaken the bolt, andl the slots' 11 are also as small as possiblel so as not. to render the bolt unnecessarily weak.

A locking-'lever 12. which is preferablyin the form of a short bar of metal is disposed in the opening 10 andhas a fulcrum pin 13 passing through samer at a pointv nearer'o'ne end than the otherI end,the ends of the pin 13 working inthe respective slots 11. 'One arm of-the -locking lever 12l is vtherefore shorter than the other sc t-hat the lever is pivoted eccentrically and isheavler at' one i end than the other, or is overbalanced at one end. One edge of -the'lever 12 is serrated as designated by 'the'numeral le, all of the teethv projecting in one directlon, the edge which is serra-ted being designed to swing 1nward when the locking lever is swung from Within the'opening 10 to a position atfri'ghtangles tothe axisof the-bolt. In order to revent thl vlocking` lever 12 from swinging the lever 12'is swung at right angles to the .105

axis of the bolt, the lever is adapted to seat against the outer end'of the opening 10 so any ing being fiatll and arranged at right'angles to the axis ofthe bolt., The vfulcrum of the -110 y bar than the upper end,

` novarese lever L2 is'also made slidable Within the opening l0 so that. the lever l2 may be swung into andA housed within the opening l0. This bolt is adapted particularlyfor securing holsters and other parts 'to the bottom of car bodies, so that the bolts need not be inserted through the'cai hottoniand bolster f in one direction, or from the inside or outside, to necessitate the engaging et the nut from the other side. This is necessary with theordinary bolt, and has heenifound inconvenient and in many cases impossible, due to interfering parts.l @Vith the present bolt, however, the holt may he inserted upward through the bolt hole or holes, the locling lever l2 having been' previously housed within 'the compass of the holt with the heavier arm thereof upward. @Then the corresponding end et the holt has been passed through the object or ohiects to he secured together, the lever l2 will swing by gravity our, of the openinglll and at right angles to the aXis of' the holt yso that the teeth lll, project inwardlya The lever l2 is thusswung to a position so that' when lthe bolt is drawn backward slightly, the teeth lll will engage the coi-responding object so that the lever' will prevent the 'further' withdrawal of thel bolt, and the 'usual nut 17 may he screw threaded on the lower or screw threaded end oit 'the holt in the usual fashion, the teeth le in engaging the object preventing the rotation of the holt. ylhe teeth le in projecting in the same direction will prevent the rotation" of thev bolt ifo either direction, andthe ulcruni pinl being slidable in the lslots llt will permit the ont-er end ot' the opening l0 to cedra'wn against the lever l2: so thatthe pin 13 is relieved of any shearing strain, as above indica'td.

lty will he noted that the pin lies in the median line oi':"'the har between its edges and is arranged closer tothe lower end of the the shortest edge of? the bar, provided by the inner or 'lower diagonali-nd thereof, being beveled tl'irough out and serrated adjoining the ends of the bar. Thus, Athat side of the'har betweenthe longitudinal median line and the longest or straight edge is heavier than the other 'sidej or that, side between the median line and the serrated or toothed edgegand as a consequence, when the har or lever is swung up. right within the opening in the holt, the

weight of the heavier side. will overba'lance the weightloi" the lighter side and the baiwill tend to maintain its position within the bolt.' This tendency of the bar to maintain its position within the bolt, however, yis not detrimental, for the reasoi'i that when the bolt is driven through an objectliy means ofa hammer, Sledge or the like, the jar will cause the bar to swing open'properly.

The above fea-ture is of advantage for the reason that .should it, he required, either during the insertion or withdrawal of the holt, tol-position lthebar within the bolt, this may be readily accomplished wit-hout fear of the bar swinging outwardlyvunless the bolt is jarred.

Another important feature of the present invention resides in the factthat the shortest edge ot' the bar is beveled and toothed adjoining the ends of 'the bar, `the beveled portions facing in the i same direction, in order that when the bar is swung open, the beveled and toothed or serrated edge portions will engage theI object. the bolt is tightened, the beveled and toothed edge will taire into or bite the object in a novel manner, the bevel serving to hind the holt hy forcing the same laterally slightly, as will he 'apparento that when the bolt is given a torsional. strain, one way or the other, one end of the bar will `tend torise, thus depressing the other end farther into the object, so that there will be no liability for the bar to swing upon the object or to permit-v the holt to rotate. The last-mentioned function is accomplishedfor the reason that the beveled portions are similarly disposed, or :tace in the saine direction, so that when the edges' of the bar'are embedded within the object, as illustrated in Fig, 3, the beveled portions will engage the Object, and when the bolt is given a rotating 'tendency in either direction, oi the bevels will tend toprise onto the surface of the object, and as a consequence, the other end of the bar l2 will be swung deeper into the object.

From the foregoing, taken in connection with the drawings, the capabilities and advantages of the present device will be appa-rent, and it will be observed aimed at arey carried out .in a manner.,

llVhat is claimed is l. In combination with a bolt having a .longitudinal opening at one end and longitudinal. slots at the sides of the opening, a

satisfactory bar yiitting in thev opening, and a pin carried' hy the bar and terminally engaging in said slots, one end of the bar being overbalanced, thebar and bolt having cooperating portions tor constraining the har to swing open in one direction, 'that edge of the bar which.

swings innermost being beveled and toothed adjoining theends of the bar, the beveled portions facing in the saine direct-ion, as and for the purpose described,

2. The conibination o'l' a ve1ticalbolt hav. 'ing a longitudinal openingat-its upper-end and longitudinal slots at the sides of the opening, the upper end of the opening being fiat and arranged at right angles to the axis 'of the boltland the lower end of the opening being diagonal, a bar fitting in the opening, and a pin carried by the bar nearer its lower end than its upper end and teri 11wally en- Thus, when i one or the otherv that the objects A lt will also be noted l ging in the s1o'ts,'the upper end of the bar in curved 'about the pin as a. center to lie snug y under the upper end of. the openingl the longest edge being strai ht'and'designed 30 seat againstthe upperen of the opening,

the beveled port-ions facing in the same 10 direction.

In testimony that I claim the foregoing as my own, .I have hereto iixed my signature injrthe presenee of two Witnesses.

' ALBERT' E. BUR-RIDGE:

Witnesses:

A. D. HOOVER, CLAYTON HABBYSHAW. 

